Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '326e1c1fe76b3264cb637439063d15a35f90003a9146ae720b2810041aba8fe8' 
  AND token = '8DZ3ejcgfFj8C5V8Mm12WXk0w8g9N8IwN79M4Ev52vc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}